121111221112120 has 16 divisors (see below), whose sum is σ = 272500247502360. Its totient is φ = 48444488444832.

The previous prime is 121111221112097. The next prime is 121111221112139. The reversal of 121111221112120 is 21211122111121.

It is a super-2 number, since 2×121111221112120² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513890263862 + ... + 1513890263941.

Almost surely, 2^{121111221112120} is an apocalyptic number.

121111221112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111221112120 is an abundant number, since it is smaller than the sum of its proper divisors (151389026390240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121111221112120 is a wasteful number, since it uses less digits than its factorization.

121111221112120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3027780527814 (or 3027780527810 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 121111221112120 its reverse (21211122111121), we get a palindrome (142322343223241).

Subtracting from 121111221112120 its reverse (21211122111121), we obtain a palindrome (99900099000999).

The spelling of 121111221112120 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twelve thousand, one hundred twenty".